Using this mode you will have low CPU usage and you can use deinterlace filter and ffdshow filter to improve image quality (in this mode you don't need MPEG2 decoders).

If you have sound problems, you should Enable in Program Settings->Driver Settings->Advanced :
1. Use alternative channel frequency setting ( for some TV Cards)
2. Use special frequency tunning (for some TV Cards - MSI TV@nywhere)
And restart.